Work-rest for grinding-machines.



No. 700,663. Patented May 420, I902. A. B. LANDIS.

WORK BEST FOR GRINDING MACHINES.

(Application fll Feb. 12, 1902.)

(No Model.)

UNITED STATES PATENT- QFFICE.

ABRAHAM B. LANDIS, OF WVAYNESBORO, PENNSYLVANIA.

WORK-REST FQR GRINDING-MACHINES.

SPECIFICATION forming part Of Letters Patent NO. 700,663, dated May 20, 1902.

Application filed February 12,1902. Serial No. 93,767. (No model.)

To all whom it may concern:

Be it known that I, ABRAHAM B. LANDIS, a citizen of the United States, residing at lrVaynesboro, in the county of Franklin and 5 State of Pennsylvania, have invented certain new and useful Improvements in Work-Rests for Grinding-Machines, of which the following is a specification.

My said invention consists in an improved construction of work-rests for grinding-machines, whereby the work is held against vibration during the process of grinding without any undue pressure being exerted against it, thus permitting the'work to be ground to its normalaxis regardless of its surface irregularities, alias will be hereinafter more fully described and claimed.

Referring to the accompanying drawings, which are made a part hereof, and on which similar letters of reference indicate similar parts, Figure 1 is a side elevation of a workrest embodying my said invention; Fig. 2, a front elevation of the same; Fig. 3, a top or plan View thereof, and Fig. 4 a sectional view on the dotted line at l in Figs. 1 and 3.

In said drawings the portion marked A represents the bed of the machine, B the standard or supporting-frame of the work-rest, and O the rest proper.

The machine may be of any welLknown or approved construction and needs no special description, a portion of the bed-plateA being shown merely to show how the work-rest is mounted thereon.

The frame or standard B consists of a casting of suitable form to adord a rigid support to the rest and of a height required for the purpose. Its top is box-like in its form, having side pieces I) and a transverse rear web b connecting them,the front and top being open. Horizontal ways are formed in said side pieces, and vertical pins or screws 11 extend across the open ends of said ways near their front ends, being mounted in vertical perforations 5 formed in said side pieces. An adjustable bearing-pointlfi, which may be a screw with a jam-nut, as shown, is mounted in one side piece near its rear side, and a clamping-screw Z) is mounted opposite thereto in the other side piece for a purpose to be described presently.

The rest 0 consists of a casting of considerable weight and of suitable form to be mounted between the side pieces 1). Its rear side, as shown, is semicircular in contour, while its front side is formed with a straight face-both at its upper and its lower corner, a depression being formed between them. While I regard this form as being particularly suitable for the purpose, yet it will be understood that it may be modified without departing from my invention. Said part 0 is mounted on a central axis or pivot c, which has wheels or rollers c thereon, and said wheels are mounted in the ways in the side pieces I), as shown. The axis 0 is so located as to practically balance the part 0 when all the parts are in position for use, and said part is thus adapted to oscillate on said axis under very slight impulse. The wheels 0' being of considerable size and mounted on a-perfectly horizontal track in the ways in side pieces I), the entire rest is adapted to move toward or from the wheel very easily. The rear side of part 0 extends to between the point 19 and the clamping-screw b and may be held rigid thereby when desired, as will be presently described. On the lower straight face of the front edge of part 0 is mounted a bearing-block O, with a suitable face to receive and bear against the under side of the work. It is preferably rigidly secured to part 0 by a screw 0 On the upper straight portion of said edge is mounted a bearing-block .0 mounted to slide in a suitable way and held in place by a screw 0 which extends through a vertical slot in said block 0 into a suitable perforation in part 0. A spring 0 is mounted on the top edge of part 0 and bears on the upper side of said bearing-block C and is of sufficient flexibility to permit it to readily yield to irregularities in the work. Said bearing-blocks are of any suitable material, preferably composition metal.

In use the work-rest is arranged as shown, being yieldingly clamped or secured to the work by'the bearing-blocks C and O engaging its opposite sides. One' or a number of said work-rests may be employed on a machine, according to the length, size, and character of the work being ground, the number used being sufficient to afford the work a firm support throughout its length and prevent any chattering or vibration thereof. each rest is balanced on its axis, it exerts no pressure on said work, as when a rest is employed which is held to the work by aspring of gravity-pressure, but being firmly attached to the work said work is made the equivalent in Weight of said rest or rests combined with its own weight, thereby making it necessary to overcome the inertia of the combined bodies to start any vibration, which will not occur in the operation of ordinary grinding. The work being thus ground without any chatter or vibration will be ground true and to its normal axis, as the rest will yield freely to any irregularities in the surface of the work without any material strain or influence on said work. If the work is very slender and should spring away from the wheel in consequence when it is practically finished, the clamping-screw b can be used to hold the rest rigid during the last cut or two, which will then hold the work rigid and insure that it shallbeofuniformsizethroughout. Therear wall I) of the housing embracing the rest will serve to protect said rest against accidental contact and pressure from the operator or others in attending the machine.

Having thus fully described my said invention, what I claim as new, and desire to secu re by Letters Patent, is

1. A work-rest 'for griuding'machines comprising a pivoted weight carrying bearingblocks to engage the work mounted to oscillate on its pivot and move horizontally.

2. A work-rest comprising a pivoted weight with hearing-blocks to engage the work, said work-rest being mounted to practically balance on its pivot and move horizontally.

3. A work-rest for grinding-machines comprising aweight mounted on an axis to oscillate and to move horizontally and having bearing-blocks formed to engage the work to firmly secure said rest to move therewith.

4. A work-rest for grinding-machines comprising a pivoted weight having bearingblocks thereon to engage the work, one of said blocks being held to the work by a yielding pressure, substantially as set forth.

5. Awork-rest for grinding-machines, comprising a weight pivoted to oscillate and to move toward and from the grinding-wheel having two bearing-blocks thereon one of which has a face to embrace a part of the work and the other of which is held to the opposite side by a yielding pressure.

6. A work-rest comprising a pivoted weight balanced on its pivot and mounted to move horizontally to accommodate the work and having bearing-blocks to engage the work and hold said rest thereto, whereby the weight of said rest is added to the work to prevent vibration, while yielding freely to the surface of the work.

7. A work-rest for grinding-machines comprising a weight with bearing-faces engaging the work, said weight being mounted to'swin g and move horizontally.

8. A work-rest comprising a weight mounted to practically balance on its axis and to move horizontally and having bearing-blocks which are adapted to engage the work to hold said rest securely thereto during the operation.

9. In a work-rest the combination, of the frame, the weight mounted on rollers in a horizontal way in said frame, and the bearingblocks adapted to engage the work to secure the Weight thereto, substantially as set forth.

10. In a work-rest the combination, of the frame, the weight mounted on an axis in wheels, which wheels are mounted to run in horizontal ways in said frame, and blocks having faces to engage the work and secure the rest thereto, substantially as set forth.

11. In a work-rest for grinding-machines, the combination, of the pivoted weight, the bearing-blocks, and the clamp for holding said weight rigid when desired, substantially as set forth.

12. In a grinding-machine, the combination, of the frame, the weight mounted on Wheels on its axis in horizontal ways in the frame the bearing-block rigid with said weight to engage one side of the work, and the bearing-block mounted to be held to the other side of the work by a yielding pressure, substantially as set forth.

13. A work-rest comprising a pivoted balanced weight provided with means for holding it to the work.

In witness whereof I have hereunto set my hand, at Waynesboro, Pennsylvania, this 7th day of February, A. D. 1902.

ABRAHAM B. LANDIS. \Vitnesses:

D. E. BESEECKER, ALF. N. RUSSELL. 

